Vulnerability Name:

CVE-2022-1212 (CCN-223357)

Assigned:2022-03-30
Published:2022-03-30
Updated:2022-04-12
Summary:Use-After-Free in str_escape in mruby/mruby in GitHub repository mruby/mruby prior to 3.2. Possible arbitrary code execution if being exploited.
CVSS v3 Severity:9.8 Critical (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.8 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
9.3 Critical (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:H)
8.4 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:H/E:P/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): Low
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:7.5 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
8.5 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-416
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2022-1212

Source: XF
Type: UNKNOWN
mruby-cve20221212-code-exec(223357)

Source: CCN
Type: mruby GIT Repository
vm.c: create break object before clearing GC arena.

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/mruby/mruby/commit/3cf291f72224715942beaf8553e42ba8891ab3c6

Source: CONFIRM
Type: Exploit, Issue Tracking, Patch, Third Party Advisory
https://huntr.dev/bounties/9fcc06d0-08e4-49c8-afda-2cae40946abe

Source: CCN
Type: huntr Web site
Use-After-Free in str_escape in mruby/mruby in mruby/mruby

Vulnerable Configuration:Configuration 1:
  • cpe:/a:mruby:mruby:*:*:*:*:*:*:*:* (Version <= 3.0.0)
  • OR cpe:/a:mruby:mruby:3.1.0:rc:*:*:*:ruby:*:*
  • OR cpe:/a:mruby:mruby:3.1.0:rc2:*:*:*:ruby:*:*

    • Configuration CCN 1:
  • cpe:/a:mruby:mruby:3.0.0:-:*:*:*:ruby:*:*
  • OR cpe:/a:mruby:mruby:3.0.0:rc:*:*:*:ruby:*:*

    • * Denotes that component is vulnerable
    BACK
    mruby mruby *
    mruby mruby 3.1.0 rc
    mruby mruby 3.1.0 rc2
    mruby mruby 3.0.0 -
    mruby mruby 3.0.0 rc